Debt (Interest Rate Swaps Narrative) (Details) (Fixed Rate, 9.125%, Due 2017 [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Jan. 31, 2014
Swap inception date	May 07, 2012
Swap notional amount	$ 140.0
Description of hedged item	$300.0 million 9.125% fixed rate senior notes due 2017
Swap fixed interest rate	9.125%
Swap variable rate basis	one-month LIBOR
Basis spread on swap variable rate	7.96%
Swap settlement cost	0.2
Ferrellgas, L.P. [Member]
Swap inception date	May 07, 2012
Swap notional amount	140.0
Description of hedged item	$300.0 million 9.125% fixed rate senior notes due 2017
Swap fixed interest rate	9.125%
Swap variable rate basis	one-month LIBOR
Basis spread on swap variable rate	7.96%
Swap settlement cost	$ 0.2